201004045 九、發明說明： 【發明所屬之技術領域】 本發明是有關於-種天線裝4，且特別{有關於一種 内建於無線通訊設備中，用以接收數位電視訊號之天線裝 【先前技術】201004045 IX. Description of the Invention: [Technical Field] The present invention relates to an antenna package 4, and particularly to an antenna device built in a wireless communication device for receiving digital television signals. 】
隨著科技的進步，通訊技術的主戰場已漸漸地從有線 的通訊技術轉移至無線的通訊技術。尤其是應料數位電 視訊號傳播上，使得無線數位電視可使用於戶外及行動接 收’不必侷限於室内收看’此時收訊品質之良莠是使用者 最重視之環節，而擔負收訊重任之天線裝置即成為無線數 位電視最關鍵之組件之一。 s以往用以接收數位電視訊號之行動裝置，天線裝置大 都是附加在行動裝置的外部來接收無限訊號，例如螺旋式 (hehx)天線，然由於外露式天線易受外力而損壞且不利於攜 帶。因此目前的設計趨勢是使用一種外接式天線裝置，: =用時再連接於行動裝置之聰埠來將無線數位電視訊號 傳运給仃動裝置。但由於數位電視的操作頻段介於廳 到870MHz’若依—般的天線物理尺寸設計會造成外接式天 線過大而不利於攜帶等等。 因此實須一 微型接收天線， 種可整合於外接式無線數位 以提昇無線行動的方便性。 電視接收盒之 【發明内容】 201004045 因此本發明的目的就是在提供—種微型無線數位電視 接收天線’可以整合在外接式無線數位電視頻率接收盒内。 為達到上述之目的，本發明之數位電視天線，係位於 一行動裝置内包含彼此間以—預設距離平行排列於一基材 上之兩個輻射導體以及一傳輸線，此傳輸線具有一接地線 與-信號線。#中每一輻射導體包含有—饋人點、一金屬 片以及-螺旋形金屬線，此螺旋形金屬線之―端連接饋入 點，另一端連接金屬片，且該螺旋形金屬線係環繞包圍該 金屬。片。兩個㈣導體κ點分別連接傳輸線之接地線 與仏號線，故可形成差動輸入訊號。 【實施方式] 第1圖繪不了根據本發明一較佳實施例之數位電視天 線100概略圖示。其巾此數位電視天線1G0係域於-行 動穿置ί列*J外接式無線數位電視接收盒中，用以接收 470MHz到870ΜΗζ之數位電視頻段，而此外接式無線數位 電視接收盒例如為—數位電視棒（DTVUSBDQNGLE)。 本發月之數位電視天線i 〇〇包括兩個並行排列且對稱 之第一與第二輻射導體102、104以及-傳輸線101。二個 輕射導體102卩104彼此間具有一預設距離d，平行配置於 基板（圖中未繪出）上。在一實施例中，此預設距離d 約為2 mm (毫米）’但在實際應用上預設距離d並不為本 實所限制’而所用以形成數位電視天'線100之基板， η係形成於外接式無線數位電視接收盒上蓋之内側，而 形成方法例如以印刷或蝕刻技術形成於接收盒上蓋之内 201004045 側。傳輪線101可以為一同軸傳輸線或一共平面傳輪線， 亦可由微帶傳輸線經平衡至不平衡轉接以形成差動輸入 端0 r %With the advancement of technology, the main battlefield of communication technology has gradually shifted from wired communication technology to wireless communication technology. In particular, the digital TV signal transmission should enable the digital digital TV to be used for outdoor and mobile reception. It is not necessary to be limited to indoor viewing. At this time, the quality of the reception is the most important part of the user, and it is responsible for the reception. The antenna device is one of the most critical components of wireless digital TV. In the past, mobile devices for receiving digital television signals, antenna devices are mostly attached to the outside of mobile devices to receive infinite signals, such as helix antennas, but the exposed antennas are vulnerable to external forces and are not conducive to carrying. Therefore, the current design trend is to use an external antenna device: = When connected to the mobile device, the wireless digital TV signal is transmitted to the swaying device. However, because the operating frequency of the digital TV is between 870MHz and the antenna physical size design will cause the external antenna to be too large to be carried and so on. Therefore, a miniature receiving antenna is required, which can be integrated into an external wireless digital station to improve the convenience of wireless operation. [Reception] 201004045 Therefore, an object of the present invention is to provide a micro-radio digital television receiving antenna' that can be integrated in an external wireless digital television frequency receiving box. In order to achieve the above object, the digital television antenna of the present invention is located in a mobile device comprising two radiation conductors arranged in parallel with each other on a substrate at a predetermined distance, and a transmission line having a ground line and - Signal line. Each of the radiation conductors includes a feed point, a metal piece, and a spiral metal wire. The end of the spiral metal wire is connected to the feed point, and the other end is connected to the metal piece, and the spiral metal wire is wound around. Surround the metal. sheet. The two (four) conductors κ points are respectively connected to the ground line and the 仏 line of the transmission line, so that a differential input signal can be formed. [Embodiment] FIG. 1 is a schematic illustration of a digital television antenna 100 in accordance with a preferred embodiment of the present invention. The digital TV antenna 1G0 is used in the external wireless digital television receiving box to receive the digital television band of 470MHz to 870ΜΗζ, and the external wireless digital television receiving box is, for example, Digital TV stick (DTVUSBDQNGLE). The digital television antenna i of the present month comprises two first and second radiating conductors 102, 104 and a transmission line 101 arranged in parallel and symmetric. The two light-emitting conductors 102A have a predetermined distance d from each other and are arranged in parallel on the substrate (not shown). In an embodiment, the preset distance d is about 2 mm (mm), but in practice, the preset distance d is not limited by the actual use, and is used to form a substrate of the digital TV day 'line 100, η The method is formed on the inner side of the upper cover of the external wireless digital television receiving box, and the forming method is formed on the side of the cover 20100404, for example, by printing or etching technology. The transmission line 101 can be a coaxial transmission line or a common plane transmission line, or can be balanced to unbalanced transmission by the microstrip transmission line to form a differential input terminal 0 r %
第一輻射導體102包含有一第一金屬片1〇6與一第一 螺旋形金屬線1〇8,其中第一螺旋形金屬線1〇8的一端為— 饋入點110,另一端連接至第一金屬片106。當第一螺旋形 金屬線108從饋入點11〇延展而出後，會以螺旋形走線方 式排列於基板上，其中隨著走線之延展每一螺旋走線環繞 面積會逐漸縮小，最後連接至第一金屬片1〇6使得第一螺 旋形金屬線108環繞排列於第一金屬片1〇6周邊。 相似的，第二輻射導體104亦包含有一第二金屬片1〇7 與一第二螺旋形金屬線1〇9,其中第二螺旋形金屬線1〇9 的一端為一饋入點112,另一端連接至第二金屬片1〇7。當 第二螺旋形金屬線1〇9從饋入點ιΐ2延展而出後，會以螺 旋形走線方式排列於基板上，其中隨著走線之延展每一螺 旋走線環繞面積會逐漸縮小，最後連接 其中饋入點U。與饋入點112係連接至一同轴傳^ 饋入點UG與同軸傳輸線⑻之信號導線連接，而饋入點 112與同軸傳輪線101之接地導線連接。 弟—螺旋形金屬線108與 ~' ·八〜立碉深i Uy啕考 之走線旋繞方向相反，其旋繞方向分別朝向鄰近之側邊。 t一實施例中，第—螺旋形金屬、線⑽與第二螺旋形金屬 之每一圈旋繞走線外觀，類似-矩形之周邊。以第 :螺：形金屬、線1〇8之第一圈為例’其走線方式係從饋入 點m延第—方向廷展—第一距離後，再延第二方向延展 7 201004045 一第一距離’其中第二方向垂直於第一方向，接著再延第 三方向延展一第三距離，其中第三方向垂直於第二方向， 且，第一方向平行但延展方向相反，最後延第四方向延展 —第四距離，其中第四方向垂直於第三方向，且與第二方 向平仃但延展方向相反。以第二螺旋形金屬線丨之第— 圈為例，其走線方式係從饋入點112延第—方向延展—第 一距離後，再延第四方向延展一第二距離，接著再延第三 方向延展一第三距離，最後延第二方向延展一第四距離了 其中第一距離與第三距離約為5〇7mm，第二距離與第四距 離約為11 mm。The first radiation conductor 102 includes a first metal piece 1〇6 and a first spiral metal line 1〇8, wherein one end of the first spiral metal line 1〇8 is — a feed point 110, and the other end is connected to the first A metal sheet 106. When the first spiral metal wire 108 extends from the feed point 11〇, it is arranged on the substrate in a spiral manner, wherein the spiral surrounding area is gradually reduced as the trace extends. It is connected to the first metal piece 1〇6 such that the first spiral metal wire 108 is circumferentially arranged around the periphery of the first metal piece 1〇6. Similarly, the second radiation conductor 104 also includes a second metal piece 1〇7 and a second spiral metal line 1〇9, wherein one end of the second spiral metal line 1〇9 is a feed point 112, and One end is connected to the second metal piece 1〇7. When the second spiral metal wire 1〇9 extends from the feeding point ι2, it is arranged on the substrate in a spiral manner, wherein the surrounding area of each spiral track gradually decreases as the wire extends. Finally, the feed point U is connected. The feed point 112 is connected to a coaxial transmission feed point UG and the signal line of the coaxial transmission line (8), and the feed point 112 is connected to the ground conductor of the coaxial transmission line 101. The spiral-shaped metal wire 108 is opposite to the winding direction of the wire to the adjacent side, and its winding direction is respectively toward the adjacent side. In one embodiment, each of the first spiral metal, the wire (10) and the second spiral metal is wound around the wire, similar to the perimeter of the rectangle. Take the first: snail: metal, the first circle of line 1 〇 8 as an example. 'The way of routing is from the feeding point m to the first direction - the first direction, then the second direction is extended. 7 201004045 a first distance 'where the second direction is perpendicular to the first direction, and then extending the third direction to extend a third distance, wherein the third direction is perpendicular to the second direction, and the first direction is parallel but the direction of extension is opposite, and finally The four directions extend—the fourth distance, wherein the fourth direction is perpendicular to the third direction and is flat with the second direction but opposite to the extending direction. Taking the first coil of the second spiral metal wire as an example, the routing mode is extended from the feeding point 112 to the first direction—the first distance is extended, and then the fourth direction is extended by a second distance, and then extended. The third direction extends a third distance, and finally extends a second distance in the second direction. The first distance and the third distance are about 5〇7 mm, and the second distance and the fourth distance are about 11 mm.
在-貫施例中，饋人點11G與饋人點112之形狀外觀 皆為-矩形’其中矩形寬度約為lmm，矩形長度約為！峨。 第-金屬>W06與第二金屬片1〇7之外觀皆為一矩形，其 中矩形寬度約為4.6 mm，矩形長度約為5〇7酿，而分別 環繞排列於第一金屬片106與第二金屬片1〇7周邊之 螺旋形金屬線108與第二螺旋形金屬線1〇9迴圈數共有$ 圈’用以形成第-螺旋形金屬線1〇8與第二螺旋形金屬線 109之走線線寬、走線間之線距、以及分別和第一金屬片 與第二金屬；^ 1〇7間之間距皆約$ 〇 3_，但在實際應 用上第-金屬Μ 1〇6與第二金屬片1〇7之外觀、環繞迴圈 數、走線之線寬與線距以及和第—金屬片1〇6與第二金 片107間之間距、饋入點110與饋入點112之外觀並不為 本實施例所限制。在其他之實施例中，因為天線之有效; 度與操作頻率與波長有關，故可藉由改變天線路徑長度^ 來設計符合頻寬需求之天線，此外亦可透過改變天=線 8 201004045 見線距與第一金屬片106和第二金屬片107幾何形狀來 影響耦合量，間接影響天線之有效長度。In the embodiment, the shape of the feed point 11G and the feed point 112 are both - rectangular 'where the rectangle has a width of about 1 mm and the length of the rectangle is about! Hey. The appearance of the first metal > W06 and the second metal piece 1〇7 is a rectangle, wherein the rectangular width is about 4.6 mm, the rectangular length is about 5〇7, and the outer circumference is arranged around the first metal piece 106 and the first The spiral metal wire 108 and the second spiral metal wire 1〇9 loop number of the second metal piece 1〇7 have a total of $ circle 'to form the first spiral metal wire 1〇8 and the second spiral metal wire 109. The line width, the line spacing between the lines, and the distance between the first metal piece and the second metal; ^ 1〇7 are about $ 〇 3_, but in practical application, the first metal Μ 1 〇 6 Appearance with the second metal piece 1〇7, the number of surrounding turns, the line width and line spacing of the wires, and the distance between the first metal piece 1〇6 and the second gold piece 107, the feeding point 110 and the feeding The appearance of point 112 is not limited by this embodiment. In other embodiments, because the antenna is effective; the degree is related to the operating frequency and the wavelength, the antenna that meets the bandwidth requirement can be designed by changing the length of the antenna path ^, and can also be changed by changing the day = line 8 201004045 The distance from the geometry of the first metal piece 106 and the second metal piece 107 affects the amount of coupling, indirectly affecting the effective length of the antenna.
、天線的返回損失經由實驗量測如第2圖所示，本實驗 k擇下列尺寸進行測量：第一與第二輻射導體間距為2 mm’且第—與第二輕射導體環繞圈數均為5圈外觀為類 似矩形之周邊’長5()·7_，寬Umm。第一金屬片與第二 金屬片寬度為4.6 _、長度為5()7麵。走線線寬、走線 間之線距、以及分別和第一金屬丨1〇6與第二金屬片間之 ^ s為0.3mm。由返回損失圖得知，天線之返回損失值 ^同於5dB，因此返回損失的實驗量測值顯示天線的整體 s史計具有良好的量測數據。 于/ w的疋，上述之天線均是以偶極天線為例進行 說明’但是本發明第一輻射導體102或第二輻射導體104 之結構亦可單獨應用，藉由改變天線線寬、線距與第一金 屬片和第一金屬片幾何形狀來影響耦合應用於單極天線 中。 ' 雖然本發明已以一較佳實施例揭露如上，然其並非用 乂限定本發明’任何熟f此技藝者，在不脫離本發明之精 神^範圍内’當可作隸之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。 【圖式簡單說明】 处為讓本發明之上述和其他㈣、特徵、優點與實施例 能更明顯易懂，所附圖式之詳細說明如下： 9 201004045 第1圖所示為根據本發明一較佳具體實施例之之數位 電視天線概略圖示。 第2圖所示為本發明天線的返回損失測量結果。 【主要元件符號說明】 100數位電視天線 101傳輸線 102第一輻射導體 104第二輻射導體 106第一金屬片 107第二金屬片 108第一螺旋形金屬線 109第二螺旋形金屬線 110饋入點 112饋入點 10The return loss of the antenna is measured by the experiment as shown in Fig. 2. The experiment is performed by measuring the following dimensions: the distance between the first and second radiating conductors is 2 mm' and the number of the first and second light-emitting conductors is The appearance of 5 turns is similar to the circumference of the rectangle 'length 5 () · 7_, width Umm. The first metal piece and the second metal piece have a width of 4.6 _ and a length of 5 () 7 faces. The line width, the line spacing between the lines, and the ^s between the first metal 丨1〇6 and the second metal piece are 0.3 mm. From the return loss graph, the return loss value of the antenna is the same as 5 dB, so the experimental measurement value of the return loss shows that the overall s history of the antenna has good measurement data. In the case of /w, the above antennas are all described by taking a dipole antenna as an example. However, the structure of the first radiation conductor 102 or the second radiation conductor 104 of the present invention can also be applied separately by changing the antenna line width and line spacing. The coupling with the first metal piece and the first metal piece geometry is applied to the monopole antenna. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims. BRIEF DESCRIPTION OF THE DRAWINGS The above and other (four), features, advantages and embodiments of the present invention will be more apparent and understood. The detailed description of the drawings is as follows: 9 201004045 Figure 1 shows a first embodiment according to the present invention. A schematic representation of a digital television antenna in a preferred embodiment. Figure 2 shows the measurement results of the return loss of the antenna of the present invention. [Main component symbol description] 100 digital television antenna 101 transmission line 102 first radiation conductor 104 second radiation conductor 106 first metal piece 107 second metal piece 108 first spiral metal wire 109 second spiral metal wire 110 feeding point 112 feed point 10